Son of Ingagi

Son of Ingagi is a 1940 American film directed by Richard C. Kahn. It was the first science fictionhorror film to feature an allblack cast. It was written by Spencer Williams based on his own short story, House of Horror. Although the films title appears to suggest that it is a sequel to the 1930 movie Ingagi, it is not. The latter is an exploitation film in the guise of an ethnographic film in which purported African women are given over to gorillas as sex slaves.

After the wedding of Eleanor and Bob Lindsay, a doctor named Helen Jackson had a discussion with Detective Nelson Spencer Williams and Jacksons attorney asking them to come over to her place so she can change her will. While Dr. Jackson works in her office she is approached by her brother Zeno, who insists that on Jacksons visits to Africa she must have taken gold and hidden it in her office. In response, Dr.Jackson hits a gong which calls upon the monster NGina, a missing link monster who she has taken from her previous trip to Africa. Jacksons brother leaves terrified. At the Lindsays wedding, an explosion erupts, which leads most partygoers to investigate with only Eleanor staying at home. Eleanor is then visited by Dr.Jackson, who explains that she was in love with Eleanors father and that she had fled to Africa later after he married Eleanors mother.Later in her laboratory, Jackson works on a potion for the benefit of human race. NGina takes the potion and drinks it which causes NGina to go on a rampage which kills Jackson. The Lindsays later find that they are beneficiaries in Helens will, and due to her sudden death they are initially suspected of murdering her. Later, the Lindsays are acquitted of the crime, and move into Helens manor. ........

Source: Wikipedia